Dabbing brush mechanism



July 8, 1947. I V 2,423,800

" DABBING BRUSH MECHANISM Filed July 1, 1944 2 Sheets-Sheet l fzzvezzioz MM ma,

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July 8,1947. I QLVA 2,423,800.

DABBING BRUSH MECHANI SM Filed July 1, 1944 2 Sheets-Sheet 2 fzzvezzor Patented July 8, 1947 UNITED STATES PATENT OFFICE DABBINGIBRUSH'MEGHANISM .Manuel Silva, Glendale, R. I.

Application July '1, 1944, Serial N 0. 543,105

- "The present invention pertains to the textile art, and has particular-referenceto apparatus for combing wool fibers.

The principal object of the invention is to prothe efliciency and the life of the dabbing brush,

thus reducing maintenance cost.

With the above and other objects and advan- '-tageous-features in viewytheinvention consists of a-novel arrangement of parts more fully disclosed in the-detailed description following, in conjunction with the accompanyingdrawings, and more --specifically definedin the claims appende'd there- In the drawings,

Fig. 1 is a top plan view, partly broken away, disclosing an illustrative operating mechanism for a dabbing brush embodying the invention;

Fig.2 is a plan view ofthe noveldabbing brush, partly'broken away;

Fig. 3 is a side elevation of the dabbing brush, parts being broken away; I r

Fig. 4 is a side elevation, partly broken away, showing the pawl and ratchet rotation imparting elements in operating position; and

Fig. '5 is a fragmentary detail, partly broken away, showing a modified construction of the pawl and ratchet elements.

It has been found desirable to provide a dabbing brush for Noble type combing apparatus which is intermittently rotated during the dabbing operation so as to present a different dabbing surface at the point-of hardest wear with each turn of the comb rack, thusevenly distributing the wear over the entire surface of the brush and enabling the brush to give long and effective service.

The novel arrangement .disclosedherein is particularly suitable forcombing machines of the Noble type, having rotating concentric large and small circles which touch at one .common point and are provided with upstandingpins, the dabbing brush being reciprocated vertically to dab the sliver of wool into the pins as the revolving circles diverge from each other. must-be dabbed precisely at the junction of the large and small circles, so that no part .of the fibre escapes the combing action and none of the fibers are pulled over the circle pin points, the

Since the sliver :2-.Claims. (Cl.

brush positively and decisively reciprocates with extreme rapidity, the normal dabbing speed for worn in the center in brushes of standard type,

andthe bristles in the worn channel become short and stubby. I

I overcome the local wear of the dabbing brush by rotating the brush intermittently as it reciprocates, thus distributing the wear evenly over the entire-surface of the brush.

Referring to the drawings the novel dabbing brush mechanism 10 is attached to reciprocating mechanism forming part of the combing apparatus (not shown) as by means of a lock screw H. The brushmechanism-includes a pawl and ratchet arrangement l2, which is intermittently actuated by a suitable apparatus [3 preferably operated from .the moving parts of the combing mechamsm.

The operatin apparatus 13 preferably comprises a support bracket 14 which has a base I5 provided with a bolt opening or openings [6 for securing to the combing apparatus frame (not shown), and :has a lateral support flange llwhich cooperates with the base I5 rotatably mount a generally vertical shaft l8, the shaft l8 having anenlarged conical portion I 9 in which an operating arm 201is secured, to be periodically actuated'by a cam or lever secured to one of the rotating combing circles, preferably the small circle.

Preferably, the bracket [4 is provided with an opening or slot'Zl to'permit free movement of the arm 20 whenactuatei-a stop pin 22 being secured to the bracket base Ilito limit return movement ,of the arm .20, resulting from the action of a tension spring 23=secured at one end to the shaft and at the other end to the bracket M.

The end of the shaft l8 extends through the flange l1 and has a lever ,24 keyed thereto, as by means of a set screw 25, and a bent lever .26 has one endpivotally secured to the freeend of the lever 24 and the other end pivotal'ly secured to the lows-r end 21a of another bent lever 21, which is pivoted intermediate its ends in a support bracket 28 adapted to be secured to the frame in which the dabbing brush is reciprocatingly mounted.

The upper end 2111 of the bent lever 21 extends over the dabbing brush I0, as shown in Fig. 1.

As the arm is periodically contacted and moved laterally, see Fig. 1, the shaft l8 turns and swings the lever 24 and thus turns lever 24, lever 26, and lever 21 to press the end 21b downwardly, the parts being returned to their initial position after each downward movement of the end 211) by means of the spring 23.

Referring now to Figs. 3 .and 4, the brush mechanism includes a brush support 29, preferably in the form of an inverted cup-shaped'casing, the upper face of the casing being generally continuous as shown in Fig. 2, and the lower face being recessed to rotatably receive an annular brush which has dabbing bristles secured therein and which is locked in place in the casing 29 by means of attaching plates 3| secured to the lower edges of the rim 32 of the casing,

The pawl and ratchet arrangement I2 includes a pawl trigger 33 pivotally mounted as indicated at 34 in a bracket 35, secured to the upper surface of the brush support, the trigger having a horizontally extendin finger 36 adapted to be periodically depressed by downward movement of the end or the leverend 21b. The pawl trigger also has a downwardly extending arm 31, and a tension spring 38 is secured to the bracket at one end and to a pin retaining link 39 at the other end, the link 39 being-sceured to the arm 31, preferably by passing through a suitable opening therethrough and having its ends bent so as to lock the link to the arm. An elongated pawl 40 is pivotally attached to the lower end of the arm 31 and has its ratchet engaging end 4| extending downwardly through a slot 42 in the upper surface of the brush casing, a flat spring 43 being mounted on the upper surface of the brush casin to resiliently hold the pawl downwardly in ratchet engagement position. The upper surface of the brush 20 is provided with an annular series of ratchet openings 44 which selectively receive the rotation imparting impact of the pawl end 4|, spaced for step-b step advance.

When the lever end 212) is periodically depressed, the actuating element (not shown) on the small combing circle operating to engage the lever 20 and depress the lever e'ndf2lb in timed relation to the reciprocating movement of the brush, it moves the finger 36 of the pawl trigger downwardly against the tension of the spring 38, thus advancing the pawlMl forwardly as shown in Fig. 4. The pawl end 4|, which is retained in down position by the flat spring 43 to selectively engage the ratchet openings 44, thus rotates the brush a distance equal to the spacing between consecutive openings 44. ment of the lever end 21b by action of the spring 23 the spring 38 pulls the pawl trigger back and thus pulls the pawl back into position to engage with the next ratchet openings.

It is thus clear that the brush element is automatically rotated in a step by step manner as the brush mechanism i reciprocated for the dabbing operation, whereby the efiiciency of the dabbing operation is maintained, the brush element is worn uniformly over its entire surface, and the effective life and usefulness of the brush is greatly increased.

The arrangement and structure of the parts may be varied a desired without changing their function or operation to accomplish the desired Upon upward moveresult. Thus, as shown in Fig. 5, the pawl trigger 33a is .pivotally mounted as indicated at 34a in a bracket 35a, and has a downwardly extending finger 36a pivotally secured thereto 5 and extending through the brush casing slot 42 to selectively engage the ratchet openings, the pawl trigger being adapted to be periodically depressed by the pawl actuating mechanism. A spring 38a is secured to the bracket 35a at one end and to an enlargement 45 of the finger 36a at its other end.

Although I have described a specific constructional embodiment of my invention, and a specific operating mechanism for the novel dabbing brush construction, it is obvious that changes in the arrangement of the parts, in their relative operation, and in the connections for operating the parts in periodic intermittent timing to the dabbing reciprocation, may be made to suit the requirements for different combing apparatus, without departing from the spirit and the scope of the invention as defined in the appended claims.-

I claim: I

1. Dabbing brush mechanism comprising a brush casing having a recess, an annular brush element having bristles and rotatably seated in said recess, said casing having a slot adjacent the rim of said element, a pawl bracket positioned on said casing adjacent said slot, a pawl trigger pivotally mounted in said bracket, a pawl pivoted at one end to the trigger and having its other end extending through said slot, spring means normally holding said pawl trigger to urge the pawl rearwardly, said brush element having a series of ratchet parts adapted to be successively engaged by said pawl, means holding said pawl in cooperative relation to said ratchet parts, and means for periodically actuating said trigger to move the pawl forwardly into engagement with said ratchet elements, whereby said brush element is intermittently rotated.

2. Dabbing brush mechanism comprising a brush casing having a recess, an annularbrush element having bristles and rotatably seated in said recess, said casing having a slot adjacent the rim of said element, a pawl bracket positioned on said casing adjacent said slot,-a pawl trigger pivotally mounted in said bracket, a pawl pivoted at one end to the trigger and having its other end extending through said slot,'spring means normally holding said pawl trigger to urge the pawl rearwardly, saidbrush element having a series of ratchet parts adapted to be successively engaged by'said pawl, spring means mounted on said casing and engaging said pawl to hold it in cooperative relation to the ratchet parts, and means for periodically actuating said trigger to move the pawl forwardly into engagement with the ratchet parts, whereby said brush element is intermittently rotated MANUEL SILVA.

REFERENCES CITED The following referencesare of record in the file of this patent:

FOREIGN PATENTS 7 Great Britain 1901 

